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Evidence for declining forest resilience to wildfires under climate change
Author(s) -
StevensRumann Camille S.,
Kemp Kerry B.,
Higuera Philip E.,
Harvey Brian J.,
Rother Monica T.,
Donato Daniel C.,
Morgan Penelope,
Veblen Thomas T.
Publication year - 2018
Publication title -
ecology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.852
H-Index - 265
eISSN - 1461-0248
pISSN - 1461-023X
DOI - 10.1111/ele.12889
Subject(s) - climate change , disturbance (geology) , environmental science , ecosystem , psychological resilience , ecology , regeneration (biology) , forest ecology , global warming , forest restoration , geography , agroforestry , biology , psychology , paleontology , psychotherapist , microbiology and biotechnology
Forest resilience to climate change is a global concern given the potential effects of increased disturbance activity, warming temperatures and increased moisture stress on plants. We used a multi‐regional dataset of 1485 sites across 52 wildfires from the US Rocky Mountains to ask if and how changing climate over the last several decades impacted post‐fire tree regeneration, a key indicator of forest resilience. Results highlight significant decreases in tree regeneration in the 21st century. Annual moisture deficits were significantly greater from 2000 to 2015 as compared to 1985–1999, suggesting increasingly unfavourable post‐fire growing conditions, corresponding to significantly lower seedling densities and increased regeneration failure. Dry forests that already occur at the edge of their climatic tolerance are most prone to conversion to non‐forests after wildfires. Major climate‐induced reduction in forest density and extent has important consequences for a myriad of ecosystem services now and in the future.